Question

(a+b/a-b)^2乘以2a-2b/3a+3b -a^2/a^2-b^2除以a/b

Answer 1

(a+b/a-b)^2乘以2a-2b/3a+3b -a^2/a^2-b^2除以a/b

=(a+b)^2/(a-b)^2*2(a-b)/[3(a+b)]-a^2/(a+b)(a-b)*b/a

=2(a+b)/3(a-b)-ab/(a+b)(a-b)

=[2(a+b)^2-3ab]/[3(a-b)(a+b)]

=(2a^2+2b^2+ab)/[3(a-b)(a+b)]

Answer 2

(a+b/a-b)^2乘以2a-2b/3a+3b -a^2/a^2-b^2除以a/b
=(A^2+B^2/A^2-B^2)*2(A-B)/3(A+B)-A^2/A^2-B^2*B/A
=(A+B)^2/(A+B)(A-B)*2(A-B)/3(A+B)-A^2/(A+B)(A-B)*B/A
=2/3-AB/(A+B)(A-B)
参考一下书本再看一下就会的了